Elementary math in Virginia is aligned with the Virginia Standards of Learning in order to hold teachers and students accountable. Here are some math resources which cater to elementary math teachers in Virginia:

Lesson Plans
Problems
Math Activities

Virginia Standards of Learning Curriculum Framework

Here you will find thorough explanations of the standards and descriptions of what students should know. The curriculum framework covers grades K-12 in both Word and PDF formats.

National Library of Virtual Manipulatives

A fantastic resource of manipulatives which are accessible through the web. Covers numbers & operations, algebra, geometry, measurement, and data analysis & probability for grades K-12.

National Council of Teachers of Mathematics

Even though Virginia follows its own Standards of Learning, we should not injure our students by limiting what they know. NCTM has high standards and guidelines for teaching mathematics and is an invaluable resource. To fully benefit from this site requires paying, but there are a lot of free areas and a 120 day free trial, making this a worthwhile site to check out.

Elementarymathresources

Elementarymathresources is a resource for all elementary math teachers. However, the site was created by a pre-service teacher in Virginia and a lot of it is aligned with the Standards of Learning and the site is a valuable resource.